I've been breeding some local stream shrimps. Wanting to maximize numbers I needed a prefilter to keep babies in the tank. Here's the DIY prefilter I've made for use with an Aquaclear 70 on my 30g and 40g tanks. It would work with any filter that uses two intake tubes like this.
1. First you get yourself a fancy square itoen tea bottle sans label

2. Cut out panels like leaving a sturdy structure. I left the back solid.
3. Cut off the foot of some stealth grey sheer elegance aw yeah baby!!!
4. Stick one intake tube in the bottle, tip to the nip.

5. Stretch the nylon as you fit it to open the weave up and trim excess.
6. Position the end of the material into the opening of the first tube. OK!
7. Stick the 2nd tube into the first, trapping the material between.

The bottle is now held onto the assembly by the tension of the nylon.

Here it is installed on the AC70 in a 40g (36x12 x21h)
Not too bad of an eyesore for freeninetynine.
I had previously rubber banded a stocking toe over the normal intake but it would become clogged within a few hours. With the surface area afforded by this huge prefilter box, I can go an entire week and clean with my normal maintenance. More cutouts can be made, I did not use all the available shape to full advantage.

1. First you get yourself a fancy square itoen tea bottle sans label

2. Cut out panels like leaving a sturdy structure. I left the back solid.
3. Cut off the foot of some stealth grey sheer elegance aw yeah baby!!!
4. Stick one intake tube in the bottle, tip to the nip.

5. Stretch the nylon as you fit it to open the weave up and trim excess.
6. Position the end of the material into the opening of the first tube. OK!
7. Stick the 2nd tube into the first, trapping the material between.

The bottle is now held onto the assembly by the tension of the nylon.

Here it is installed on the AC70 in a 40g (36x12 x21h)
Not too bad of an eyesore for freeninetynine.
I had previously rubber banded a stocking toe over the normal intake but it would become clogged within a few hours. With the surface area afforded by this huge prefilter box, I can go an entire week and clean with my normal maintenance. More cutouts can be made, I did not use all the available shape to full advantage.



